EP1237297A2 - Funk-Kommunikationsendgerät und Verstärkungsregelungsschaltung hierfür - Google Patents

Funk-Kommunikationsendgerät und Verstärkungsregelungsschaltung hierfür Download PDF

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Publication number
EP1237297A2
EP1237297A2 EP02251472A EP02251472A EP1237297A2 EP 1237297 A2 EP1237297 A2 EP 1237297A2 EP 02251472 A EP02251472 A EP 02251472A EP 02251472 A EP02251472 A EP 02251472A EP 1237297 A2 EP1237297 A2 EP 1237297A2
Authority
EP
European Patent Office
Prior art keywords
transmission
adjacent channel
channel leak
monitor
level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02251472A
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English (en)
French (fr)
Other versions
EP1237297A3 (de
EP1237297B1 (de
Inventor
Mikio c/o Kabushiki Kaisha Toshiba Hayashihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
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Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Publication of EP1237297A2 publication Critical patent/EP1237297A2/de
Publication of EP1237297A3 publication Critical patent/EP1237297A3/de
Application granted granted Critical
Publication of EP1237297B1 publication Critical patent/EP1237297B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
    • H03G3/3047—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers for intermittent signals, e.g. burst signals

Definitions

  • the present invention relates to a radio communication terminal and a gain control circuit to be applied to the radio communication terminal.
  • Modulation is performed with use of amplitude variation elements in a modulation system for an up channel of a recent digital mobile communication system such as a ⁇ /4 shifts QPSK applied to a PDC (Personal Digital Cellular) system that is a mobile radio system being in current use, an OQPSK applied to a cdmaOne system, a W-CDMA system that is a mobile radio system planned to be used in the near future, a HPSK applied to a cdma 2000 system, etc.
  • a modulation system for an up channel of a recent digital mobile communication system such as a ⁇ /4 shifts QPSK applied to a PDC (Personal Digital Cellular) system that is a mobile radio system being in current use, an OQPSK applied to a cdmaOne system, a W-CDMA system that is a mobile radio system planned to be used in the near future, a HPSK applied to a cdma 2000 system, etc.
  • PDC Personal Digital Cellular
  • FIG. 5 shows an example of a PA with a function of adjusting power supply.
  • a primary stage amplifier which comprises a transistor Q1 and load inductor L1
  • the input signal is amplified through the primary amplifier.
  • the amplified signal is supplied to an output stage amplifier, which comprises a transistor Q2 and load inductor L2 through an interstage impedance matching circuit M2.
  • the supplied signal is amplified in the output stage amplifier and outputted to an output terminal through an output matching circuit M3.
  • Power consumption of the PA is expressed by the product of the sum of collector current flowing through each of the transistors multiplied by power voltage Vcc.
  • the collector current flowing through each of the transistors can be controlled through a bias control circuit 401 that comprises a transistor Q3 and resistance R1. By lowering applied voltage to a bias control terminal shown in FIG. 5, the collector current of the transistor Q3 is reduced. By doing this, the collector current of the transistors Q1 and Q2, which are connected to each other in a current mirror manner through choke coils LC1 and LC2, can be reduced.
  • FIG. 6 shows an example of variation in the gain of the PA against the voltage applied to the bias control terminal. It shows a case where the lower the bias control voltage deteriorates, the less gain diminishes.
  • the level of the transmission signal deteriorates lower than the level of up transmission signal that is primarily required by the base station.
  • the gain of the PA deteriorates. Therefore, a problem arises in that the level of the transmission signal deteriorates lower than the level of up transmission signal that is primarily required by the base station.
  • an object of the present invention is to provide a radio communication terminal and a gain control circuit to be applied to the radio communication terminal, which can maintain a level of up transmission signal, which is required by a base station, while restricting power supply of a PA to the level at which an appropriate adjacent channel leak power ratio is provided.
  • a radio communication terminal is a radio communication terminal comprising a radio transmission section, wherein the radio transmission section comprising:
  • a gain control circuit comprising:
  • FIG. 1 shows the structure of a mobile radio terminal according to an embodiment of the present invention, as well as a mobile communication system to which the mobile radio terminal is applied.
  • the mobile radio terminal is wirelessly connected to a base station BS of the mobile communication system, and communicates with some other communication station via a mobile communication network.
  • W-CDMA Wideband Code Division Multiple Access
  • a high-rate, large-volume multimedia mobile communication is carried out using, e.g. a 5 MHz bandwidth in a 2 GHz band.
  • Mobile radio terminals are discretely disposed within a service area and perform communication in synchronism with the base station BS connected to a public network.
  • a W-CDMA radio section 1 transmits and receives CDMA signals via an antenna 50 with a base station BS according to the W-CDMA method.
  • the W-CDMA radio section 1 receives coded data from a voice CODEC section 2 via a control section 8, and transmits the coded data.
  • the W-CDMA radio section 1 receives coded data and delivers it to the voice CODEC section 2 via the control section 8.
  • the chip rate of spread codes is set at 3.84 Mcps, and a QPSK method is used as a first-order modulation method.
  • the voice CODEC section 2 encodes a transmission voice signal input from a microphone 3 according to a predetermined voice encoding method and passes the coded signal to the W-CDMA radio section 1 via the control section 8. In addition, the voice CODEC section 2 decodes the coded data input from the W-CDMA radio section 1 via the control section 8 and converts it to a reception signal. The reception signal is output from a loudspeaker 4 with amplified magnitude.
  • a memory 5 comprises a semiconductor memory such as a RAM or a ROM.
  • the memory 5 stores control programs for the control section 8.
  • the memory 5 stores, for instance, menu image data to be displayed on a display section 7.
  • An operation section 6 is a key input section comprising numeral keys, 4-direction keys, and various function keys.
  • the operation section 6 receives a user's instruction on ordinary call transmission/reception, scrolling of information displayed on the display section 7, and the like.
  • the display section 7 comprises an LCD (Liquid Crystal Display), a plasma display, or the like.
  • the control section 8 controls the respective sections of the mobile radio terminal. Specifically, the control section 8 performs controls relating to, e.g. radio communication via the mobile communication network, and display on the display section 7.
  • FIG. 2 is a block diagram of a transmission section of the W-CDMA radio section 1 shown in FIG. 1.
  • VGA variable gain amplifier
  • an up radio transmission signal is frequency-changed to a radio frequency by a frequency-changing circuit (not shown).
  • the frequency-changed signal is amplified to a predetermined level through a PA 102.
  • the signal passes through a directional coupler 103, isolator 104 and duplexer 105, and is transmitted from an antenna 106.
  • a radio transmission signal is branched at the directional coupler 103 by a predetermined minute ratio and performed a level adjustment in a variable attenuator 107.
  • an adjacent channel leak power ratio monitor 108 An adjacent channel leak power ratio (ACPR), which is included in the radio transmission signal to be emitted from the antenna 50, is output as an ACPR monitor output (monitor value) from the adjacent channel leak power ratio monitor 108, and input into a PA power supply control section 109.
  • ACPR adjacent channel leak power ratio
  • the power supply control section 109 comprises a subtracter 201 that compares an ACPR reference value supplied from the control section 8 shown in FIG. 1 to an ACPR monitor output, and an integrator 202 which integrates an error as the compared result.
  • An output of the PA power supply control section 109 is input, for example, into a bias control terminal of the PA 102 shown in FIG. 2 so as to control power consumption of the PA 102.
  • the adjacent channel leak power ratio monitor 108 is constituted as shown in FIG. 4.
  • a reference numeral 301 denotes a squaring circuit; 302, a first band pass filter (BPF) which extracts distortion elements corresponding to the adjacent channel leak power; 303, a second band pass filter (BPF) which extracts elements corresponding to a main part of a radio modulation signal; 304, 305, a log amplifier (log_Amp) serving as a level measuring instrument in decibel; and 306, a subtraction circuit as a level ratio measuring instrument.
  • the ACPR monitor output is output from the subtraction circuit 306.
  • the main part of the radio modulation signal appears in an output of the log_Amp 305, and is detected as a transmission level monitor output.
  • the squaring circuit 301 can be constituted by using, for example, a multi-plier that multiplies at least two signals together, or using a non-linear device having a second-order distortion coefficient. Note that, the specific structure of the squaring circuit 301 has been described in detail in the US Patent Application No. 09/934675 applied by the present inventor.
  • the transmission level monitor output that is incidentally obtained from the adjacent channel leak power ratio monitor 108 is compared through a subtracter 110 with a gain control signal (gain setting value) supplied from a base band signal processing section of the control section 8 shown in FIG. 1.
  • a gain control signal (gain setting value) supplied from a base band signal processing section of the control section 8 shown in FIG. 1.
  • An error that is the result of the comparison is integrated through an integrator 111, and then an output from the integrator 111 is used as a gain control signal of the VGA 101.
  • a gain of the VGA 101 changes such that the transmission level monitor output comes close to the gain setting value.
  • a level of the radio transmission output to be emitted from the antenna 50 changes so as to come close to the gain setting value supplied from the base band signal processing section.
  • the radio communication terminal of the present embodiment has: a function of varying a level of the transmission output signal, which varies the transmission output signal level by controlling the gain of a transmission signal path; and a function that the radio modulation signal branched from a signal path between a transmission PA and an antenna is input into the adjacent channel leak power ratio monitor, and a bias of the PA is variously controlled with use of an output value from the adjacent channel leak power ratio monitor.
  • the function of varying the transmission output signal level compares the transmission signal level monitor value, which is subordinately output from the adjacent channel leak power ratio monitor, to the gain setting value supplied from the base band signal processing section. The function then controls the gain of the transmission signal path so that the difference found by the above comparison can become zero. According to such a method of controlling, it is possible to obtain the desired transmission signal level in the radio transmission section while restricting the power supply of the PA to the level at which an appropriate adjacent channel leak power ratio is provided.

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  • Transmitters (AREA)
  • Control Of Amplification And Gain Control (AREA)
EP02251472A 2001-03-02 2002-03-01 Funk-Kommunikationsendgerät und Verstärkungsregelungsschaltung hierfür Expired - Lifetime EP1237297B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001058514A JP3477177B2 (ja) 2001-03-02 2001-03-02 無線機及び利得制御回路
JP2001058514 2001-03-02

Publications (3)

Publication Number Publication Date
EP1237297A2 true EP1237297A2 (de) 2002-09-04
EP1237297A3 EP1237297A3 (de) 2003-03-19
EP1237297B1 EP1237297B1 (de) 2005-02-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02251472A Expired - Lifetime EP1237297B1 (de) 2001-03-02 2002-03-01 Funk-Kommunikationsendgerät und Verstärkungsregelungsschaltung hierfür

Country Status (4)

Country Link
US (2) US7031682B2 (de)
EP (1) EP1237297B1 (de)
JP (1) JP3477177B2 (de)
CN (1) CN1168225C (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1965491A1 (de) * 2007-03-02 2008-09-03 SIAE Microelettronica S.p.A. Hochfrequenz-Steuerschaltung
EP2182641A1 (de) * 2008-10-30 2010-05-05 Apple Inc. Elektronische Vorrichtungen mit kalibrierten RF-kommunikationsschaltkreisen
US8116703B2 (en) 2008-12-08 2012-02-14 Apple Inc. Wireless transmitter calibration using device receiver
US8165642B2 (en) 2009-05-13 2012-04-24 Apple Inc. Electronic device with data-rate-dependent power amplifier bias
WO2012112947A1 (en) * 2011-02-18 2012-08-23 Qualcomm Incorporated Adaptive average power tracking
US8255009B2 (en) 2008-04-25 2012-08-28 Apple Inc. Radio frequency communications circuitry with power supply voltage and gain control
EP2621093A1 (de) * 2012-01-27 2013-07-31 Research In Motion Limited Mobile Drahtloskommunikationsvorrichtung mit selektiver Leistungsverstärkersteuerung und zugehörige Verfahren
US8738066B2 (en) 2010-10-07 2014-05-27 Apple Inc. Wireless transceiver with amplifier bias adjusted based on modulation scheme and transmit power feedback
US8913970B2 (en) 2010-09-21 2014-12-16 Apple Inc. Wireless transceiver with amplifier bias adjusted based on modulation scheme

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JP3513138B2 (ja) 2002-01-16 2004-03-31 株式会社東芝 通信端末およびその制御回路
KR100561843B1 (ko) * 2003-10-02 2006-03-16 삼성전자주식회사 전력 증폭기의 자동 이득 제어장치
JP2006050054A (ja) * 2004-08-02 2006-02-16 Matsushita Electric Ind Co Ltd 無線電話装置およびその消費電流制御方法
US7933570B2 (en) * 2006-02-03 2011-04-26 Quantance, Inc. Power amplifier controller circuit
US8032097B2 (en) 2006-02-03 2011-10-04 Quantance, Inc. Amplitude error de-glitching circuit and method of operating
US8095090B2 (en) * 2006-02-03 2012-01-10 Quantance, Inc. RF power amplifier controller circuit
US7917106B2 (en) * 2006-02-03 2011-03-29 Quantance, Inc. RF power amplifier controller circuit including calibrated phase control loop
CN101401261B (zh) * 2006-02-03 2012-11-21 匡坦斯公司 功率放大器控制器电路
US7869542B2 (en) * 2006-02-03 2011-01-11 Quantance, Inc. Phase error de-glitching circuit and method of operating
JP2008098830A (ja) * 2006-10-10 2008-04-24 Matsushita Electric Ind Co Ltd 送信回路及び携帯端末装置
JP4895912B2 (ja) * 2007-05-15 2012-03-14 パナソニック株式会社 信号増幅装置
US7941110B2 (en) 2007-07-23 2011-05-10 Freescale Semiconductor, Inc. RF circuit with control unit to reduce signal power under appropriate conditions
US20100022209A1 (en) * 2008-07-25 2010-01-28 Motorola, Inc Method and apparatus for reducing peak current variation in a radio
JP5003824B2 (ja) 2008-12-15 2012-08-15 日本電気株式会社 電力検出回路、送信装置および電力検出方法
US8582035B2 (en) 2011-02-22 2013-11-12 Intel Corporation Apparatus, systems and methods utilizing adjacent-channel power dependent automatic gain control for digital television demodulation
US10483926B2 (en) * 2015-02-15 2019-11-19 Skyworks Solutions, Inc. Power amplifier module with power supply control
CN107070486B (zh) * 2017-05-27 2019-08-30 青岛海信移动通信技术股份有限公司 一种调整射频功率放大器的供电电压的方法及射频电路
JP2020198592A (ja) * 2019-06-05 2020-12-10 三菱電機特機システム株式会社 送信電力制御回路

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JPS60190035A (ja) * 1984-03-09 1985-09-27 Nec Corp 衛星通信送信電力制御方式
US5182527A (en) * 1990-03-30 1993-01-26 Oki Electric Industry Co., Ltd. Power amplifying apparatus for wireless transmitter
US5465399A (en) * 1992-08-19 1995-11-07 The Boeing Company Apparatus and method for controlling transmitted power in a radio network
JP3192323B2 (ja) * 1994-07-29 2001-07-23 沖電気工業株式会社 電力制御回路
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JP2001358606A (ja) 2000-06-14 2001-12-26 Matsushita Electric Ind Co Ltd 時分割多重方式無線装置
JP4413398B2 (ja) 2000-08-30 2010-02-10 株式会社東芝 漏洩電力比検出回路および移動通信端末の制御回路

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1965491A1 (de) * 2007-03-02 2008-09-03 SIAE Microelettronica S.p.A. Hochfrequenz-Steuerschaltung
US8255009B2 (en) 2008-04-25 2012-08-28 Apple Inc. Radio frequency communications circuitry with power supply voltage and gain control
EP2182641A1 (de) * 2008-10-30 2010-05-05 Apple Inc. Elektronische Vorrichtungen mit kalibrierten RF-kommunikationsschaltkreisen
WO2010056416A1 (en) * 2008-10-30 2010-05-20 Apple Inc. Electronic devices with calibrated radio frequency communications circuitry
US8331883B2 (en) 2008-10-30 2012-12-11 Apple Inc. Electronic devices with calibrated radio frequency communications circuitry
US8116703B2 (en) 2008-12-08 2012-02-14 Apple Inc. Wireless transmitter calibration using device receiver
US8165642B2 (en) 2009-05-13 2012-04-24 Apple Inc. Electronic device with data-rate-dependent power amplifier bias
US8913970B2 (en) 2010-09-21 2014-12-16 Apple Inc. Wireless transceiver with amplifier bias adjusted based on modulation scheme
US8738066B2 (en) 2010-10-07 2014-05-27 Apple Inc. Wireless transceiver with amplifier bias adjusted based on modulation scheme and transmit power feedback
WO2012112947A1 (en) * 2011-02-18 2012-08-23 Qualcomm Incorporated Adaptive average power tracking
US8538353B2 (en) 2011-02-18 2013-09-17 Qualcomm Incorporated Adaptive average power tracking
EP2621093A1 (de) * 2012-01-27 2013-07-31 Research In Motion Limited Mobile Drahtloskommunikationsvorrichtung mit selektiver Leistungsverstärkersteuerung und zugehörige Verfahren

Also Published As

Publication number Publication date
US7031682B2 (en) 2006-04-18
EP1237297A3 (de) 2003-03-19
CN1168225C (zh) 2004-09-22
US20020123315A1 (en) 2002-09-05
US7430405B2 (en) 2008-09-30
CN1374760A (zh) 2002-10-16
US20060003716A1 (en) 2006-01-05
JP3477177B2 (ja) 2003-12-10
JP2002261631A (ja) 2002-09-13
EP1237297B1 (de) 2005-02-09

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